Share "who is on call" in single canlendar webcal

have a need and or seeing if anyone has done this.

We are trying to share our oncall calendars via webcal feeds.
this works fine but requires individual URL’s for each schedule.

Has anyone created or know of a way to feed these individual webcal feeds into a single calendar or to publsh a list, example “who is on call today”.
We are wanting to share this with different parties whom are NOT users of pagerduty just need to know the contact person for a particular group.

thanks for any help/ideas.